Combined operator and latch for a swinging window



E. G. SIMPSON Oct. 5, v1937.

COMBINED OPERATOR AND LATCH FOR A SWINGING WINDOW '7 Sheets-Sheet 1 Filed May 27, 1956 INVENTOR.

[MO/P) GL srwv sl/JASON BY 6 M I 7" ATTORNEYS.

E. G. SIMPSON 2,094,726

COMBINED OPERATOR AND LATCH FOR -A SWINGING WINDOW Oct. 5, 1937.

7 sheets-sheet 2 Filed May 27, 1936 1 INVENTOR. 510m GLEN/VISIMPJON mil mna ww ATTORNEYS.

Dot. 5, 1937.

e; SIMPSON COMBINED OPERATOR AND LATCH FOR A SWINGING WINDOW I Filed May 27, 1936 7 SheGtS-ShGGt' 3 RN 2% N M. L.

ATTORNEYS.

E. G. SIMPSON Oct. 5, 1937.

Filed May 2'7, 1956 7 Sheets-Sheet 4 1|( llllll 11 1 1 i I l l I l 1 l l l I l I l l I l l l I I I l l l l l l I l l l l l1 T INVENTOR.

EMORY G4 E/Y/V AS/MPwSO/Y Oct. 5, 1937. E. a. SIMPSON COMBINED OPERATOR AND LATCH FOR A SWINGING WINDOW v Sheets-Sheet 5 Filed may 27, 1936 INVENTOR. EMORY GLENN JmPao/v BY 6 w ATTORNEYS.

E. a. SIMPSON 2,094,726

Oct 5, 1937.

COMBINED OPERATOR AND LATCH FOR A SWINGING WINDOW 7 sheets-shew 6 Filed May 27, 1936 INV ENT OR. fi/WOPY GLEN/V fi/MPsaN BY v ATTORNEY/5.

Oct. 5, 1937. E, SIMPSON 2,094,726

COMBINED OPERATOR AND LATCH FOR A SWINGING WINDOW Filed May 27, 1956 "7' Sheets-Shet '7 INVENTOR. fMOFY. GLENN S/MPefiO/V ATTORNEY/5.

Patented Oct. 5, 1937 PATENT ori ice 7 2,094,726 COMBINED OPERATOR AND LATCH FOR SWINGING WINDOW Emory Glenn Simpson, Detroit, Mic-11., assignor to Ternstedt Manufacturing Company, Detroit,

Mich a corporation Application May 27,

15 Claims.

This invention relates to a combined operator and latch for a swinging window.

It is the object of this invention to produce a combined operator and latch for a swinging window'which is simple in structure, cheap to manufacture, and efficient in operation.

In the drawings: V

Fig. 1 is a fragmentary side-elevation of an automobile body showing the combined operator hr and lock used with the swinging glass of the no draft ventilating window.

Fig. 2 is a front elevation of the combined operator and latch showing the window'closed and l 7, locked. v 1'5 Fig. 3 is a section along the line 33' of Fig. 2.

Fig. 4 is a section along the line 44 of Fig. 2.

Fig. 5 is a section along the line 5-5 of Fig. 3.

Fig; 6 is a detail of the latch bolt.

Fig. 7 is a view similar to Fig. 2 showing the 1y latch, bolt retracted.

Fig. 8 is a View similar to Fig. 2 showing a modified form of the invention with the swinging glass locked.

Fig. 9 is a view similar to Fig. 8 with the latch bolt retracted.

Fig. 10 is a section along the line I Il-Ifl of Fig. 8.-

Fig. 11 is a detail of the gear carried by the swinging glass support shaft.

Fig. 12 shows a second modified form of the invention.

Fig. 13 is a section along the line |3-I3 of Fig. 12.

Fig. 14 is a third modified form of the invention.

Referring more particularly to the drawings 40 section Weatherstrip frame 5 and supported at its lower edge by the shaft 3 so that it swings about a vertical axis. window opening.

The combined glass operator and lock is sup- 45 ported on a support plate 5' having a flange 1' whichis welded to the base of the channel frame 5 A gear 8, having a socket extension 9 anda hub portion It. is rotatab'ly supported on the plate 6. The hub it of the gear 8 is journaled 50 in the support bearing 63 formed in the bottom wall of'support plate 64 which is riveted to the plate 6 as at 65 (see Fig. 12). As shown in Fig. 5, a friction strap H, welded as at I2 to the cover plate I3, is passed about the hub: Hi" and 5'5 drawn tight by the'ad justing screw l4. Thus,

The frame 51is fixed in the of Michigan 1936, Serial No. 82,097 (Cl. 268-119) the strap II cooperates with the hub NJ to form a friction hinge support for the shaft 3 and friction-ally hold the panel 5 against swinging other- Wise permitted by the play in the window operating mechanism. The shaft 3' is set into the socket 9 and held therein by the set screw l5.

A gear sector It is rotatably supported on the plate 6 by the pin [1. Another gear sector It is rotatably mounted on the plate 5 by a pin I9. The gear sector I8 meshes with the driving. pin ion 28 fixed on the spindle 2! which carries the usual operating crank handle .22. A pair of tog gle levers 23 and 24 are pivotally connected by the pin 25. The lever 23 is pivotally connected to the sector it by the pin. 26. The lever 24 is pivotally connected to an adjustable support plate 2'!- by the pin 28 (Fig. 4). The adjustable support plate This carried by support plate. 29 which is riveted to the support plate tlby rivets The rivets 30 pass through the elongated slots 3| in the plate 21 and have enlarged heads. whereby the plate 21 is slidably retained upon the plate 29-. The plates 2'5 and 29. shown in Fig. 4, have flanges 32 and 33. An adjusting screw 34 is threaded into the tapped opening 35 in the flange 32 and is journaled into the flange 33 as at 3'5 and into a flange 31 on the support plate 5' as at 38. The screw 34" is provided with a square head 39 by means of which it can be turned to adjust the plate 21 along the plate 29. The plate 27 is adjusted upon its support 29 so that the toggle 1evers'23 and 24 are at, or slightly over, center' when the window glass is completely closed. A draft link 40 is also pivotally connected to the toggle at the elbow by the pin 25 and is pivotally connected to the gear sector l'8- by the pin 4| which is riveted to the sector l8 as at 42.

The cover plate [3 which is riveted to the support plate 6, as at 45, serves as a support and guide for the bolt 45. The cover plate 3has an opening 41 through which the bolt passes and a pin- 48 pivoted thereto which engages the bolt. in the elongated slot 49. The bolt also passes through an opening 51] in the flange l of the support plate. fi'and the base of the Weatherstrip channel 5. The Weatherstrip 5! is also provided with an opening 52 through which the bolt is projected into engagement with a keeper opening 53' in the base of the window glass frame 4.

For projecting and retracting the bolt 46 the lower end of the bolt is provided with a. slot 54. The slot 54 is positioned so that it will interengage the pin 4| on the sector l8 as the swinging glass 1 reaches closed position and during closed position and the initial movement of the operator in the opening of the swinging glass.

The operation of this device is as follows: As shown in Fig. 2, the window panel is closed. The bolt 46 is interengaged with the opening 53 in the glass frame 4 thus locking the swinging window in closed position. At this time the toggles 24 are either at, or slightly above, center, that is, a line passing through pins 26 and 2&3. To open the window, as viewed in Fig. 2, the crank 22 and pinion 25 are turned counterclockwise which causes sector |8 to rotate clockwise about its support l9 and through draft link 43 break'the toggle downwardly and rotate the sector |6 clock-' wise which in turn through gear 8 and the shaft 3 swings the window to open position. As the sector l8 swings clockwise to break the'toggle downwardly, the pin 4| engages the bottom edge 57 of the slot 54 thus camming o-r retracting the bolt 46 from the keeper opening 53 before the window panel I begins to swing open. After the toggle is broken downwardly past center, the gears l6 and 8 begin to turn, as above described, to open the window.

When the window is closed and the bolt 46 projected, it will be noted that the pin 4| is seated against the inner end of the slot 54 and that the pin 48 engages the bottom of the elongated slot 49. As the gear l8 continues to turn in the opening of the window, the pin 4| rides out of the slot 54 just as the pin 48 abuts the upper end of the slot 49, as indicated in the dotted line showing, Fig. '7. Thus, the pin 48 holds the bolt in the proper position so that upon closing the panel 9 the pin 4| will again enter slot 54.

In closing the window the crank 22 is turned so that the gear l8 rotates counterclockwise which, acting through the link 45', moves the toggle lever center upwardly to enlarge the overall lengthof the toggle and rotate the gear l6 counterclockwise which, through the gear 8 and shaft 3, closes the window. As the toggle approaches center position, pin 4| engages the upper edge 58 of notch 54 thereby camming the bolt 46 upwardly into engagement with the keeper 53. The

' rotation of the gear l8 continues until the toggle is moved to center, or slightly over, center position. In. other words, the swinging panel operating mechanism opens and closes the window glass and after the window reaches closed posi-. tion, or before the window glass starts to open, the toggle elbow can be moved slightly belowcenter without materially shortening the overall length of the toggle or causing any material movement of the gear l6. Similarly in closing the panel I, the panel I reaches closed position just before the toggle reaches center and further movement of the toggle to center causes no appreciable movement of pin 26 away from pin 28. This lost motion of the toggle at or near center position is utilized to either project or retract the bolt 46 while the window is closed.

In Figs. 8, 9 and 10, there is shown a modified form of the invention. In this arrangement the swinging window 8 and gear 3 aremounted the same as in the principal form of the invention and the pinion 25 drives the gear l8 which is rotatably mounted on the shaft l9. The gear it has fixed thereto the lever Bil which rotates with the gear is about the shaft IS. The sector H5 is rotatably mounted on the shaft H and meshes with the gear 8. In this form of the invention the toggle levers 23 and 24 are mounted as above described but are positioned below, instead of above, the shaft H. A draft link 43 is pivotally connected to the lever 6|] by the pin 6|. The bolt 46 is mounted the same as above described but is projected and retracted by a pin 62 carried on the toggle lever 24.

In this form of the invention when the pinion 20 is turned counterclockwise the gear l8 rotates clockwise thus breaking the toggle 23, 24 downwardly and which causes the sector I6 to rotate counterclockwise which, acting through gear 8 and shaft 3, swings the window open. In this form of the invention the pin 52 cooperates with the slot 54 and the bolt 46 the same as pin 4| in the principal form of the invention. Thus, when the window glass is closed the initial turning movement of the pinion 26 causes the toggle 23, 24 to break downwardly from its position slightly above or at center thus causing the pin 52 to cam the bolt 46 downwardly and out of engagement with the keeper 53 before the window glass begins to swing open.

In the closing of the window, as illustrated in Fig. 9, as the toggle Z3 nearly reaches straightened position the window glass is closed. Further movement of the toggle toward the straight po-' sition causes the pin 62 to engage the slot 54 and project the bolt 46 into engagement with the keeper 53 in the window glass frame.

A second modified form of the invention is shown in Figs. 12 and 13. In this form of the invention the gear 8 is mounted the same as previously described. The gear sector l6, which meshes with the gear 8, is freely rotatably mounted upon the spindle 2| on which driving pinion Z9 is fixed. Thus, the shaft 2| is free to turn independently of the sector l6 but the pinion 2|! always turns with the shaft 2!. The pinion 20 meshes with the gear sector 66 which is pivotally mounted on the pin 6i. The toggle levers 23 and 24 are the same as in the principal form of the invention and the draft link 46 is pivotally connected to the gearsector 66 by the pin 68.

In this form of the invention when the pinion- 26 rotates in the direction of the arrow, the gear 66 turns clockwise about the shaft 67, thus drawing the link 45 downwardly and breaking the toggle downwardly. Thus, the toggle, through pin 26, rotates the sector |6 clockwise in the direction of the arrow and causes the window to open. In closing the window the reverse of this operation takes place.

When the window is closed the bolt 46 interengages the keeper opening 53 in the window glass channel 4, and the toggles 23 and 24 are at, or slightly above, center position. The initial turning movement of the gear 66 to break the toggle downwardly does not materially rotate the gear l6. This initial movement of the gear 66 is translated to the bolt 46 to retract the same by the lever 69 carried by the gear 66 which engages a notch 70 in the bolt 46. In the downward or clockwise rotation of the lever 69, it engages the bottom face H of the notch H! and cams the bolt 46 downwardly as indicated by the dotted line showing. In closing after the window glass E reaches closed position, the lever 69 engages the upper face 12 of the notch and draws the bolt 46 upwardly into interengagement with the keeper 53 of the glass frame 4. The upward movement of the lever 69 is arrested by the stop pin 13.

In Fig. 14 there is shown a third modified form of the invention which is similar in all respects to the principal form of the invention except that in the principal form of the invention the pin 4| serves a double purpose; namely, it pivotally conas that of the absence nects the link 40' to the sector [8 and, also: cooperates with the slot 54 to project and retract the bolt whereas in this modified form a pin T5 pivotally connects the. link 40- with the sector t8: and a separate pin 16, mounted on a projection 11 of the gear l8, cooperates: with the notch 5* to project and retract the bolt 46 The operation of'this modified form is the: same principal form. 1

I claim:

1. In a window assemblyhaving a window panel adapted for movement to open and closed.

positions, mechanism for moving: the Window to open and closed positions including; a toggle, a locking mechanism interengageable with the. said: window panel when closed. for locking the same, and a separable connection connected to: said toggle between the ends of the same and also connected to the locking mechanism for oper atively connecting the locking mechanism and the. toggle only when the window panel is closed and during the initial breaking'and. final straightening movements of the said toggle whereby the said window panel is looked after reaching closed. position and unlocked before opening.

2. In a window assembly having a window panel adapted for movement to open and closed positions, mechanism formoving the window panel to open and closed positions including atoggle the elbow of which approaches center posi tion in the closing of the window panel, a locking mechanism interengageable with the said window panel when closed for locking the same, and a disconnectable operative connection connected to said toggle between the ends of the same and also connected to said locking mechanism, the said operative: connection being disconnected when the window panel-is open and ineffective: to interengage the locking mechanism and the window panel and being connected and eii'ective to interengage the locking mechanism and the window panel after the panel is closed and as the toggle approaches center.

3. In a window assembly having a window panel adapted for movement to open and closed positions, mechanism for moving the window panel to open and closed positions including a toggle the elbow of which approaches center position in the closing of the window panel, a latch bolt, a keeper for the said bolt carried by the window panel, the said bolt beingprojectable into interengagement with the said keeper to lock the window when closed, and a di'sconnectable operative connection between the latch bolt and the said toggle, the said connection being connected to said toggle approximately at the elbow of the same, the said operative connection being disconnected from the bolt when the window panel is open and connected and efiecti ve to project the bolt into interengagement with the window panel when the panel is closed-and as thetoggl'e approaches center.

4. In a window assembly having a window panel adapted for movement to open and closedpositions, mechanism for moving the window panel to open and closed positions including a toggle the elbow of which approaches center position when the mechanism isoperatecl'to close the window panel, a latch bolt and a keeper therefor carried by the window panel, a separable con-- nection between the latch bolt and the toggle,

' said connection being connected to said'toggl'e intermediate the ends of the same, the said separable connection operatively connecting the latch bolt tothe toggle as the toggle approaches center position "in the/closing of the window to protect the latch bolt into interengagement with the keeper after the window reaches closed po sitione, the said connection retracting the latch boltfrom thekeeper before the window panel starts .to move to open position as the toggle leaves center position when the mechanism is operated to open the window and the connection subsequently separating to disconnect the latch bolt and the toggle;

In. awindow assembly having a window panel adapted for movement to open and closed positions, mechanism for moving the window panel to open and closed positions including a toggle the elbow of which approaches center po'sitiorr when the. mechanism is operated to close the; window panel, a latch bolt retractablev to project the latch bolt into i nterengagement with; the keeper after the window reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle leaves center position before the window panel starts to move to open position and through a predetermined range when'the mechanism is operated to open the window panel and the connection separating as the latch bolt reaches the endof its range of movement to disconnect the latch bolt from the. toggle.

'6'. In a window assembly having a window panel adapted for movement to open and closedposi'tions, mechanism for moving the window panel to! open and closedpositions including a toggle the elbow of which approaches center position when the mechanism is: operated to close the. window panel, a reciprocable latch bolt, stop means" permitting reciprocation of the bolt through a predetermined range, a keeper therefor carried by the window panel, a separable connection between the latch bolt and the elbow of said toggle, the said separable connection op'er ata'b'lyconnecting the latch bolt to the toggle as the toggle approaches center position in the closing of thewindow panel to project the latch bolt intolinterengagement with the keeper after the window reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before thewindow panel starts to move to open position and through a predetermined range when the toggle is operated to open the window and the connection separating as the latch bolt reaches the end of its range of movement to disconnect the latch bolt from the toggle.

7. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions including a toggle the elbow of which approaches center position when the mechanism is operated to close the swinging window panel, a reciproc'able latch bolt, stop means permitting reciprocation of the bolt through a predetermined range in a direction across the straightened toggle, a keeper therefor carried by'the swinging window panel, a separable con-nection between the latch bolt and the toggle elbow, the said separable connection operatably connecting the latch bolt to the toggle as the toggle elbow approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said connection retracting the latch bolt from the keeper .as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through a predetermined range when the mechanism is operated to open the swinging window and the connection separating as the latch bolt reaches the end of its range of movement to disconnect the latch bolt from the toggle.

8. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions in cluding driving and driven gears and'a toggle for transmitting the driving torque from one gear to the other, the said toggle elbow approaching center position when the mechanism is operated to close the swinging window panel, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper therefor carried by the swinging window panel, a separable connection between the latch bolt and the mechanism for swinging the said window panel, the said separable connection operatably connecting the latch bolt to the mechanism for swinging the window panel as the toggle elbow approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through a predetermined range when the mechanism is operated to open the swinging window and the connection separating as the latch bolt reaches the of its range of movement to disconnect the latch bolt from the mechanism for swinging the window;

9. In a window assembly having. a swinging window panel adapted for swinging to open and closed positions, a support, mechanism for swinging'the window panel to open and closed positions mounted on said support, the said mechanism including driven and driving gears and a toggle, one end of which is pivotally secured to the support and the other end of which is pivotally connected to the driven. gear, means operatively connecting the toggle to the. driving gears, the position when the mechanism is operated to close the swinging window panel, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper therefor carried by the swinging window panel, a s-ep rable connection between the latch bolt and the mechanism for swinging the said window panel, the said separable connection operatably connecting the latch bolt to the mechanism for swinging the window panel as the toggle elbow approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the.

window panel reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move. to open position and through a predeterminedrange. when the mechanism is operated to open said toggle elbow approaching center to the support and the other end of which is pivotally connected to the driven gear, a link one end of whichis pivotally connected to the toggle and the other end of which is pivotally connected to the driving gear whereby when the driving gear isrotated the toggle is broken toward the said driving'gear which causes the driven gear to rotate, the said toggle elbow approaching center position when the mechanism is operated to close the swinging window panel, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper therefor carried by the swinging window panel, a separable connection. between the latch bolt and the mechanism for swinging the said window panel, the said separable connection operatively connecting the latch bolt to the mechanism for swinging the window panel as the toggleelbow approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through a predetermined range when the mechanism is operated to open the swinging window and the connection separating as the latch bolt reaches the end of its range of movement to disconnect the latch bolt from the mechanism for swinging the window.

11. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, a support, mechanism for swinging the window panel to open and closed positions mounted on said support, the said mechanism including driving and driven gears and a toggle one end of which is pivotally secured to the support and the other end of which ispivotally connected to the driven gear, a link one end of which is pivotally connected to the toggle and the other end of which is pivotally connected to the driving gear whereby when the driving gear is rotated the toggle. is broken toward the said driving gear which causes the driven gear to rotate, a driving pinion for turning the driving gear and a gear fixed to the swinging window support shaft and meshed with the driven gear for swinging the said window panel, the said toggle elbow approaching center position when the mechanism is operated to close the swinging window panel, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper therefor carried by the swinging window panel, a separable connection between the latch bolt and the mechanism for swinging the said window panel, the said separable connection operatively connecting the latch bolt to the mechanism for swinging the window panel as the. toggle elbow approaches center position in the closing of the swinging window panel to protect the latch bolt into interengagement with the keeper after the Window panel reaches closed position, the said connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through a predetermined range when the mechanism is operated to open the swinging window and the connection separating as the latch bolt reaches the end of its range of movement to disconnect the latch bolt from the mechanism for swinging the window.

12. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions including a driven gear and a driving mechanism for the driven gear comprising a driving gear, a toggleone end of which is pivotally connected to the driven gear and the other end of which has a fixed pivot, the said toggle being operatively connected with the driving gear so that the toggle is approximately on center when the window panel is closed, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper for the bolt carried by the swinging window panel, a pin and a slot connection between the latch bolt and the said driving mechanism, the said pin and slot connection operatively connecting the latch bolt to the mechanism for swinging the window, panel as the toggle approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said pin and slot connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through the said predetermined range when the mechanism is operated to swing the swinging window, and the pin separating from the slot as the latch bolt reaches the end of its range of movement to disconnect the latch bolt from the driving mechanismfor the said driven gear.

13. In a window assembly having a swinging r window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions including a driven gear and a driving mechanism for the driven gear comprising a driving gear, a toggle one end of which is pivotally connected to the driven gear and the other end of which has a fixed pivot, the said toggle being operatively connected with the driving gear so thatthe toggle is approximately on center when the Window panel is closed, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper for the bolt carried by the swinging window panel, a pin carried by the driving gear and a slot in the said bolt, the said pin and slot connected operatively connecting the latch bolt to the mechanism for swinging the window panel as the toggle approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said pin and slot connection retracting the latch bolt from the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open position and through the said predetermined range when the mechanism is operated to swing the swinging Window, and the pin separating from the slot as the latch bolt reaches the end of "its range of movement to disconnect the latch bolt from the driving mechanism for the said driven gear.

14. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions including a driven gear and a driving mechanism for the driven gear comprising a driving gear, a toggle one end of which is pivotally connected to the driven gear and the other end of which has a fixed pivot, the said toggle being operatively connected with the driving gear so that the toggle is approximately on center when the window panel is closed, a reciprocable latch bolt, stop means permitting reciprocation of the bolt through a predetermined range, a keeper for the bolt carried by the swinging window panel, a pin carried by one of the toggle levers and a slot in the said bolt, the said pin and slot connection operatively connecting the latch bolt to the mechanism for swinging the window panel as the toggle approaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said pin and slot connection retracting the latch boltfrom the keeper as the toggle elbow leaves center position before the swinging window panel starts to move to open' position and through the said predetermined range when the mechanism is operated to swing the swinging window, and the pin separating from the slot as the latch bolt reaches the endof its range of movement to disconnect the latch bolt from the driving mechanism for the said driven gear.

15. In a window assembly having a swinging window panel adapted for swinging to open and closed positions, mechanism for swinging the window panel to open and closed positions including a driven gear and a driving mechanism for the driven gear comprising a driving gear, a toggle one end of which is pivotally connected to the driven gear and the other end of which has a fixed pivot, the said toggle being operatively connected with the driving gear so that the toggle is approximately on center when the window panel is closed, a reciprocable latch bolt, stop means permitting reciprocation of thebolt through a predetermined range, a keeper for the bolt carried by the swinging window panel, a driving connection between the driving gear and the said bolt comprising a projection carried by the said driving gear and a slot in the said bolt adapted for engagement with the said projection, the said connection operatively connecting the latch bolt to the mechanism for swinging the window panel as the toggleapproaches center position in the closing of the swinging window panel to project the latch bolt into interengagement with the keeper after the window panel reaches closed position, the said connection EMORY GLENN SIMPSON. 

